A sacrificial roll of film in every way. I ended up at Castle Cornet after work and needing a walk to clear my head. With me I had the Pentax 17 loaded with a roll of Rollei B&W based on a old formula and one with would be used to experiment with the various zone focusing modes and exposure compensation on the camera as well as figuring out the coverage of the viewfinder. To round out the experimentation this was also one of the first pair of films that I developed myself. A few things I learnt - lower exposure = way more grain with this film. No two frame sizes are alike. The film may move a fraction when winding and so even though it's a half-frame, the split may not necessarily be down the centre. So when cropping the scan there can be quite a difference in the aspect ratio. On the development side, I don't know if it was me or a defect with the roll, but the last few frames had a crease in the roll. As if when spooled it had folded over itself. Finally as seen in the last shot. Don't put the hanging clip on the negative itself when hanging it up to dry!